Truing-machine.



J. SAUNDERS.

TRUING MACHINE.

APPLICATION FILED JUNE 11. 1915.

1,154,343. PatentedSept. 21, 1915.

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JAMES SAUNDERS, OF DAYTON, OHIO, ASSIGNOR TO WALTER C. DUNN, OF WYOMING,

OHIO.

TRUING-MACHINE.

Specification of Letters Patent. I

PatentedSept. 21, 31915.

Application filed June 11, 1915. Serial No. 33,467.

To all whom it may concern:

Be it known that 1, JAMES SAUNDERS, a citizen of the United States, residing at Dayton, county of Montgomery, and State of Ohio, have invented certain new and useful Improvements in Truing-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification. 7

My invention relates to portable machines for truing the worn or cut journal bearings of car axles, wherein, when the axle has been removed from the car, the machine is attached thereto and a new and true bearing surface produced.

The object of myinvention is to so construct the machine that the work can be easily, speedily and accurately executed; that the lead screw which is used to feed the cutter may be caused to rotate in either direction at the will of the operator for setting up or returning the tool for a subsequent cut; that the machine will be cheap to produce and will be efficient in action.

The novelty'of my invention will be hereinafter more fully set forth and specifically.

pointed out in the claims.

In the accompanying drawing. Figure 1 is a central sectional side elevation of a machine embodying my invention. Fig. 2 is a sectional end elevation taken on the line AA of Fig. 1 looking in the direction of the arrow. Fig. 3 is a view of the front plate of the main frame showing the gearing contained therein and the lead screw and main drive shaft in section. Fig. 4: is a partly broken, partly sectioned view of the gearing contained in the front plate of the main frame, enlarged. Fig. 5 is a broken view of a modification of the mechanism shown in Fig.8.

through the medium of the spacing rods 3.-

These rods may be secured to the end plates by having'their ends reduced and threaded and provided with nuts 4 or they may be attached in any other suitable manner. The front plate 1 is preferably dished as shown to afford a housing for the gearing. boss 5 extends rearwardly from the front 7, rear plate 8, guide rods 9 and the lead screw 10. The parts above enumerated,

r plate at'its center and this boss affords a with the exception of the lead screw, are

rigidly connected together in such manner that they form a rigid construction.

A tool post 11 is mounted upon the guide rods 9 in such manner that it is free to slide thereon and the lead screw 10 is threaded through a suitable opening in this tool post and forces the same back and forth upon the guide rods, depending upon which direction the lead screw is rotating. Any suitable tool 12 is clamped in the tool post, by means of the clamp screws 13 and adjusted for the proper cutting depth by the screw 14:.

The main drive shaft 15 is suitably .journaled in the front plate 1 and extends rearward and has its rear end suitably journaled 1n the rearplate 2. This shaft is provided with two'equal sized pinions l6 and 17 which are rigidly attached thereto or may if preferred be made integral therewlth, and these pinions mesh with gear teeth out in the outer diameters of the front and rear plates 6 and 8 of the tool carrier above referred to. A third pinion 18, which may be rigidly attached to or formed integral with the shaft 15, is located near the pinion 16 and drives an idler 19, which is suitably journaled in the front plate 1, and which in turn drives a clutch gear 20, which is also suitably ournaled in the front plate 1. The

clutch, gear 20 is provided with a conical clutch cavity 21 and a hollow stem 22 (seen more clearly by referring to Fig. 4) and a gear 23 with a clutch portion 24 and stem 25 is mounted and journaled in the gear 20. The stem 25 of the gear 23 passes through the hollow stem 22 of the gear 20 and'is provided with the hand wheel 26 which is threaded on the outer end of the hollow stem '22 in such manner that when turned in one direction, the two clutch members above referred to are brought into engagement, and

when turned in the opposite direction, the

clutch members are disengaged, as will be readily understood. v

A ring gear 27is mounted or journaled 'upon a suitable bearing 28 arranged concentric with the boss 5 of the front plate 1.

This ring gear 27 is considerably wider faced than the gear 23. and that portion which is not traversed by the latter engages the planetary pinion 29 which is secured to the forward end of the lead screw 10. A pinion 30, mounted fast upon the end of a stub shaft 31, engages or meshes with the ring gear 27. The shaft of this pinion is carried out beyond the front plate 1 and has its outer end squared to receive a hand crank 32 (shown detached in Fig. 1,) the purpose of which will be explained later. i

I The mechanism bymeans of which the machine is attached to the work, consists of a scroll chuck plate 33, carried upon the rear plate 2, and operating a series of chuck ]2tWS 3-l which are guided in the rear plate and its are adapted to engage the part of the car axle generally known as the dust collar. The scroll plate 33 is provided with apertures 35 for the reception of, any suitable bar by means of which it is rotated to bring the aws firmly against the dust collar, after which a series of set screws 36 are caused to engage the dust collar to'firmly hold the rear end of the machine in position.v

The front plate is provided with a center: ing screw 37 which passes through and is threaded in the front plate 1 and is adapted to engage the counterbored center of the'axle in such manner that the front end of the machine is accurately centered on the axle, as will be readily understood. a

Any suitable means may be employed to drive the shaft 15, such as a universal joint and shaft 38 which may in turn be operated from an electric or compressed air motor, not shown.

The operation of the device is as follows: The car axle and wheels are removed from under the car and the truing machine is placed in position on the extending bearing, the chuck plate is then operated to bring the jaws against the dust collar of the axle and the front centering screw is brought into proper position with relation to the counter-bored center of theaxle and the set screws are brought into action,-

whereupon the mounting of the truing machine is complete and the process of producing a new bearing surface can be started. After the machine is mounted as described, the operator releases the friction clutch by turning the hand wheel 26 in the proper direction and applies the hand crank 32 to the square shaft, whereupon he can, by turning this hand crank, bring the tool 12 to the proper position for starting the cut and adjust it properly to remove the required amount of metal from the bearings Having completed the above setting up, the operator now starts his motor which puts the shaft 15 in rotation and through the pinions 16 and .17 and their engagement with the teeth in the peripheries of the plates 6 and 8 respec- 'while rotating around the same.

tively, the tool carrier is revolved and the gear train in the front plate 1 is set in motion to revolve or rotate the ring gear 27 which in turn rotates the lead screw 10 and causes the tool to advance along the work At the finish of the first cut, the operator releases the friction clutch,which while the cut is being made is engaged, and by again attaching the hand crank to the squared end of the shaft 31 and holding the same'against rota tion, stops the ring gear 27, andthe rota tion of the tool carrier, carrying with it the lead screw, imparts a reverse direction of rotation to said lead screw and thereby returns the tool post to a positionsuitable for the commencement of the second out, whereupon the' operator disengages the hand crank and reengagesthe friction clutch and the cut proceeds as before. The sizes of the gears in the friction clutch train is such that the ring gear is driven in the same direction and at a. greater speed than the speed of the tool carrier, and therefore, when all the parts are in operation the lead, screw is revolved in one direction, while, when the ring gear is held against rotation, the lead screw is turnedin the opposite direction.

In the modification shown in Fig. 5,,the hand crank and pinion 30 are not necessary to the reversing of the lead screw whilethe main shaft 15 is rotating, for the reason that the idler 19 is mounted on an extension of the handle 38 in such manner that when this handle is moved from the position shown, the idler is disengaged from the gear 20 and the dog or stationary tooth. 39 is caused to engage the gear 20 to stop the same and consequently, the ring gear 27 which will result in the reversing ofthe lead screw in the same manner as described above. I

The handle 38' may be provided with any suitable means for holding it in either of its adjusted positions, such as a plunger 40 which may pass through theh'andle and engage suitable recessesin the front plate, these latter not beingshown, I

By modifying. the chucking, and centering means, the principles of this machine are well suited to the truing of wrist pins, and in fact for the, truingof any kind of extendingshaft ends or journals and while I have only shown a chucking mechanism suitable fcr use on car axles, it is not my intention to limit the uses of this device for that purpose, as the chucking means form only an incident to the complete machine.

Having thus fully described my. invention, 1 claim, 7

1. In a truing machine, a frame comprising chucking and centering means, a revolving tool carrier ournaled within said frame and comprising atool post. andalead screw for moving the tool post, and driving mechanism whereby said tool carrier may be r0- tated in one direction and said lead screw may be rotated continuously in either direction.

2. In a truing machine, a frame comprising chucking and centering means, a revolving tool carrier journaled within said frame and comprising a tool post and a lead screw said lead screw may be reversed while said tool carrier is revolving.

4t. In a truing machine, a frame, a revolving tool carrier journaled within said frame, a tool post mounted within said tool carrier, a lead screw for said tool post, driving mechanism for said tool carrier, continuous driving mechanism for said lead screw, clutch controlled means whereby the direction of rotation of said lead'screw may be reversed or its rotation stopped at the will of the operator while said tool carrier is revolving.

5. In driving mechanism for the lead screw of a truing machine, a gear journaled concentric with the center of rotation of a tool carrier, driving mechanism for said gear, a clutch whereby said driving mechanism may be disconnected from said gear,

and means whereby said gear may be prevented from rotating.

6. In planetary gear movement, a revolving member carrying a pinion, a driving gear meshing with said pinion, means for rotating said driving gear, and means whereby the speed of said gear may be changed to cause said pinion to revolve in "either direction or remain stationary while traveling around the center of movement of the revolving member, and a pinion carried by said revolving member.

7. In driving mechanism for the lead screw of a truing machine, a planetary pinion carried by a revolving tool carrier, a

driving gear for said pinion and. journaled on the aXis of rotation of the tool carrier, mechanism for driving said driving gear in the same direction as said tool carrier and at greater speed than said tool carrier, and means whereby the rotation of said driving gear may be stopped thereby imparting a reverse direction of rotation to said planetary pinion. V

8. In driving mechanismfor the lead screw of a truing machine, a planetary pinion carried by a revolving tool carrier, a driving gear for said pinion and journaled 0n the axis of rotation of the tool carrier, mechanismfor driving said driving gear in the same direction as the tool carrier and at greater speed than said tool carrier, a clutch for disconnecting said driving mechanism to permit said driving gear to revolve at constant speed with said tool carrier and thereby stop the rotation of said lead screw, and means whereby said driving gear may be prevented from rotating thereby imparting a reverse direction of rotation to said planetary pinion.

i JAMES SAUNDERS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

